Cloth-piercing drill.



N.'BURKER.' CLOTH PIERCING DRILL.

APPLICATION FILED FEB-18 19H,

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NATHAN BURKER, OF NEW YORK, N. Y.

CLOTH-PIEROING DRILL.

Application filed February 28, 1917.

To all whom it may concern:

Be it known that I, NATHAN BURKER, a resident of the city of New York, county of New York, and State of New York, have invented certain new and useful Improvements in Cloth-Piercing Drills, of which the following is a specification.

My invention relates to improvements in cloth piercing drills, and the object of my invention is to provide a simple and novel device for drilling a small hole through a stack of cloth. The well known rotating type of drill when used for this purpose has the inherent defect of catching the fibers in the cloth and winding them around itself; also another previous method has been to drive a piece. of rod through a few layers of cloth at a time, it having been found to be too difficult to drive it through all of the layers at once as these layers are often stacked to a height of about four inches.

I attain the desired result by the device illustrated in the accompanying drawings in which Figure 1 is a complete side view and Fig. 2 is a top view.

In Fig. 1 a suitable body member 1 which rests on a stack of cloth 2 in which it is desired to drill a hole is provided with a motor base 3 to which is fastened an electric motor l having its armature shaft 5 arranged vertically, at the upper end of this shaft is fastened the small gear 6, which meshes into a larger or reduced speed gear 7, this gear 7 is carried rotatably of a stationary fulcrum stud 8, which is fastened in the body member extension 9. The gear 7 has a crank pin stud 10 attached to it which oscillates the lever 11 through the short connecting rod 12, the lever 11 being fulcrumed on the stationary stud 13. The oscillatory motion of the lever 11 is transmitted to the drill 14 through the connecting link 15 which is loosely attached to the lever 11 at 16, and the drill actuating arm 17 at 18. This drill actuating arm 17 is attached to the sleeve 17 by a small screw 19 so that the Sleeve 17 a oscillates together with the arm 17.

Specification of Letters ratent.

Patented Apr. 16, 1918.

Serial No. 151,465.

This sleeve 17 is provided with a square hole through its center in which is slidably carried the square rod 20, the upper end of which is rounded off and carries a knob '21, a spring 22 is interposed between the upper end of the sleeve 17 and the lower end of the knob 21 thus holding the square bar 20' normally upward, the drill 1a is fastened to the lower end of the square bar 20 and is guided in the plate 23, an opening 24 is left in the base member through which the drill reaches the cloth.

In the practical operation the device is placed on a stack of cloth with the drill over the spot to be drilled; the motor is started in the usual manner and the knob 21 is depressed by hand until the drill is projected through the stack of cloth, then the spring withdraws the drill or it may be assisted by a slight pull on the knob.

As I believe-the novelty of my device lies in the oscillating and vertically slidable drill, I do not wish to confine myself to the specific mechanism herein shown and described.

What I claim is r 1. In a cloth piercing device, a crank disk, means for rotating the crank disk, a rocking lever, a connecting rod for operatively connecting said disk and lever, a drill actuating arm, a second connecting rod connecting said rocking lever and drill actuating arm, a drill and drill carrying bar arranged for oscillation with the drill actuating arm and slidably mounted therein.

2. In a cloth piercing device, a crank disk, means for rotating the crank disk, a rocking lever, a connecting rod for operatively connectin said disk and lever, a drill actuating arm, a second connecting rod connecting said rocking lever and drill actuating arm, a drill and drill carrying bar arranged for oscillation with the drill actuating arm and slidably mounted therein, and a loosely mounted depressing knob at the upper end of the said drill carrying bar.

8. In a cloth piercing device, a crank disk, means for rotating the crank disk, a rocking drill carrying bar and a spring interposed between the said knob and the said drlll 10 actuating arm.

lever, a connecting rod for operatively connecting said disk and lever, a drill actuating arm, a second connecting rod connecting said rocking lever and drill actuating arm, a drill and drill carrying bar arranged for oscillation with the drill actuating arm and slidably mounted therein, a loosely mounted depressing knob at the upper end of the said NATHAN BURKER.

Witnesses EDWARD FIsI-I, DQMINIOK MAINENTE.

oalies 055 this patent may be obtained i'or five cents each, by addressing" the fiommissioner of Patents.

Washington, D. 8. 

